JP4969205B2 - Writing instrument - Google Patents

Description

  The present invention relates to a writing instrument in which a tip portion of a writing body held by a shaft tube can be covered with a cap that is movably attached to the shaft tube.

Conventionally, what was described in patent document 1 is known as this kind of writing instrument.
In the writing instrument described in Patent Document 1, the writing body is held on the shaft tube, the tip of the writing body is projected forward of the shaft tube, and a slide member is provided in the shaft tube so as to be movable in the axial direction. A sealing member capable of covering the tip of the writing body is connected to the tip of the slide member, and an operation unit that can be operated from the outside of the shaft cylinder and is movable in the axial direction is connected to the slide member. Yes. And the control means which rotates a slide member and a sealing member according to the movement of the slide member in the axial direction is provided between the shaft cylinder or the writing body and the slide member. For example, the control means is provided on the shaft cylinder. The cam surface is formed, and an engaging convex portion that is formed on the slide member and moves on the cam surface. The cam path formed by the cam surface forms different cam paths when the sealing member is switched from the sealed state to the unsealed state and when the sealing member is switched from the unsealed state to the sealed state. The engagement projections are switched by passing through different cam paths.

JP 2004-262222 A

  It is an object of the present invention to provide a writing instrument that improves the above-described conventional configuration and can more stably and surely switch between a sealed state and a sealed release state of a cap that is a sealing member. And

  In order to achieve the above object, the invention according to claim 1 of the present invention includes a shaft tube, a writing body held by the shaft tube, and a tip portion protruding forward from the shaft tube, and the writing body. A cap portion that can cover the tip portion of the writing body, and a cap that is movably attached to the shaft tube so as to switch between a sealed state and a sealed release state of the tip portion of the writing body, and the operation of the cap In a writing instrument comprising an operating member, a guide provided on the cap, an urging member that urges the cap backward, and the guide can be engaged, and the cap is advanced from the unsealed state. The first guide path that guides the movement of the guide and the guide can be engaged with each other so that the guide is moved back to the sealed state, and the cap is advanced from the sealed state. After turning, it is retracted to release the seal. A second guide path that guides the movement of the guide, and the guide engages only with the first guide path when the cap is in the unsealed state, and the cap is in the sealed state. In some cases, it is only engaged with the second guide path.

  According to a second aspect of the present invention, the first guide path and the second guide path according to the first aspect are provided to face each other with the guide interposed therebetween, and the guide is between the first guide path and the second guide path. The cap is movably provided on the cap.

  According to a third aspect of the present invention, in the second aspect of the present invention, the first guide path includes a first guide portion that guides the movement of the guide so as to advance the cap from the unsealed state, and the cap is rotated. A central portion for guiding the movement of the guide so as to cause the second guide portion to retreat the cap, and the second guide path guides the movement of the guide so as to advance the cap from the sealed state. A first guide portion, a central portion for guiding the movement of the guide so as to rotate the cap, and a second guide portion for retracting the cap, and the first guide portion of the first guide path and the second guide path While the second guide portion is opposed to the second guide portion, the first guide portion of the first guide path extends rearward from the second guide portion of the second guide path. And the first guide portion of the second guide path While facing, characterized in that the direction of the first guide portion of the second guide passage is extended rearward than the second guide portion of the first guide path.

  According to a fourth aspect of the present invention, in the third aspect, the central portion of the first guide path is inclined and extended forward from the front end of the first guide portion toward the front end of the second guide portion. The central portion of the second guide path extends from the front end of the first guide portion to the front end of the second guide portion so as to incline forward.

  According to a fifth aspect of the present invention, in the third or fourth aspect, the first guide path and the second guide path are grooves, and the guide is inserted into the groove, whereby the first guide path and the second guide path. It is characterized by engaging with a guide path.

  According to a sixth aspect of the present invention, in the fifth aspect, the rear end portions of the second guide portion of the first guide path and the second guide portion of the second guide path are directed toward the rear. The groove bottom gradually becomes shallow.

  According to a seventh aspect of the present invention, the cap according to any one of the first to sixth aspects includes a pair of arm portions that pass between the shaft tube and the writing body, and the pair of arm portions is the cap. It is characterized by supporting the part.

  The invention according to claim 8 is the one according to claim 7, wherein the first guide path is provided in one of the shaft cylinder and the cursive body, and the second guide path is provided in either one of the shaft cylinder and the cursive body, The guide is slidably provided on the arm portion, and the guide is inserted into at least one of the first guide path and the second guide path.

  The invention according to claim 9 is characterized in that the cap according to any one of claims 1 to 8 is connected to the operation member so as to be tiltable.

  According to the present invention, the guide is engaged only with the first guide path when the cap is in the unsealed state, and is engaged only with the second guide path when the cap is in the sealed state. The guide can be guided along the first guide path when the cap is changed from the unsealed state to the sealed state, and the guide is guided along the second guide path when the cap is changed from the sealed state to the unsealed state. Can be reliably and stably switched between the unsealed state and the sealed state.

  Further, since the cap portion is supported by the pair of arm portions, the sealed state of the writing body can be stably maintained in a balanced manner.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall longitudinal sectional view showing an embodiment of a writing instrument according to the present invention.

  In the figure, reference numeral 10 denotes a shaft tube, and the shaft tube 10 is composed of two parts, a main body 12 and a tip tool 14. In this example, the shaft cylinder is composed of two parts for convenience of assembly. However, the number of parts is not necessarily limited to this, and it may be composed of one part or three or more parts.

  As shown in FIG. 2, the main body 12 and the tip tool 14 are integrated by inserting the rear end portion of the tip tool 14 into the tip end portion of the main body 12 to form the shaft tube 10. The shaft cylinder 10 has a substantially quadrangular inner shape in the cross section. Grooves 12 a are formed on the inner surfaces of both side surfaces of the main body 12, and notches 14 a are formed on the rear end portions of both side surfaces of the leading tool 14. When the main body 12 and the leading tool 14 are integrated, Further, the groove 12a and the notch 14a are combined to form a pair of laterally deformed U-shaped guide grooves 15.

  The deformed U-shaped guide groove 15 is not the same in length corresponding to both U-shaped leg portions, and has a long front-rear groove portion 15a extending in the front-rear direction as one leg portion of the U-shape, and the other leg portion. The front and rear groove portions 15b are shortened. The rear end portion of the longer front and rear groove portion 15a gradually becomes shallower as the groove depth goes rearward, and the end of the rear end portion becomes almost zero. Further, the central portion 15c, which is a U-shaped central portion, extends in a direction inclined with respect to the direction orthogonal to the front-rear direction, and the inclination extends from the short front-rear groove portion 15b side to the long front-rear groove portion 15a side. It is heading forward.

  The rear end surface of the main body 12 is not perpendicular to the front-rear direction, but has an inclined shape inclined from the right angle.

  A writing body 16 is held on the shaft tube 10. Specifically, as shown in FIGS. 3 and 4, the writing body 16 includes a writing body 18, a pen tip 20 protruding from the writing body 18, and a pen tip 20 disposed inside the writing body 18. And a tail plug 24 that seals the rear portion of the cursive body 18.

  On the outer surface of the cursive body 18 is formed a locking portion 18a that is locked to a locking portion 12b formed inside the main body 12, and the locking portion 12b is locked with the locking portion 18a. The cursive body 16 is fixed in the shaft cylinder 10. A projecting portion 18 b that projects forward and surrounds the pen tip 20 is formed at the tip of the cursive body 18. The pen tip 20 protrudes from the protrusion 18b and protrudes forward from the tip of the shaft tube 10 to be used for writing. Further, a cap receiver 18c is formed at the tip of the cursive body 18 along with the protruding portion 18b. The cap receiver 18c is for receiving the cap portion 30c when the cap 30 to be described later is in an unsealed state. The cap receiver 18c is arranged so that the cap portion 30c can be accommodated in the shaft tube 10. It is positioned at a position deeper than the tip of the tool 14.

  The external shape of the cross section of the cursive body 18 is substantially rectangular so as to match the internal shape of the shaft tube 10, and deformed U-shaped guide grooves 19 are formed on the outer surfaces of both side surfaces thereof. The deformed U-shaped guide groove 19 does not have the same length corresponding to both U-shaped leg portions, the front and rear groove portions 19a serving as one U-shaped leg portion are long, and the front and rear groove portions 19b serving as the other leg portion. Is shorter. The rear end portion of the shorter front and rear groove portion 19b gradually becomes shallower as the groove depth goes rearward, and the end thereof is almost zero in depth. Further, the central portion 19c, which is a U-shaped central portion, extends in a direction inclined with respect to the direction orthogonal to the front-rear direction, and the inclination is forward from the long front-rear groove portion 19a side to the short front-rear groove portion 19b side. It has come to go.

  The cap 30 that covers the tip of the nib 20 when not in use is inserted between the shaft tube 10 and the writing body 16 so as to be movable in the front-rear direction and rotated in the up-down direction. It is possible to arrange. As shown in FIG. 6, the cap 30 has a square cylindrical base portion 30a at the rear end, a pair of arm portions 30b, 30b extending forward from the base portion 30a, and a pair of arm portions 30b. , 30b is integrally connected with a cap portion 30c. In this example, the cap 30 is composed of a single molded part. However, for example, the cap part 30c and the arm part 30b can be composed of a plurality of parts as separate parts. A protrusion 30d that can be elastically deformed inside and outside is formed at the rear part of the arm part 30b, and a through hole 30e is formed at an intermediate part of the arm part 30b.

  A knock member 32 is connected to the rear end of the cap 30. The knock member 32 is exposed from the rear end of the shaft cylinder 10 and enables the knock member 32 to be knocked using the notched portion of the inclined rear end portion of the main body 12 of the shaft cylinder 10. As shown in FIG. 7, the external shape of the cross section of the knock member 32 is also substantially rectangular so as to match the internal shape of the shaft tube 10, and both side surfaces thereof are long in the direction perpendicular to the axial direction. A long hole 32a is formed. The protrusion 30d of the cap 30 is slidably fitted into the elongated hole 32a, so that the cap 30 is connected to the knock member 32 so as to be tiltable and rotatable. Further, a rod-like portion 32b extends from the rear end surface to the front inside the knock member 32, and a knock spring 34 is wound around the rod-like portion 32b. As shown in FIG. 1, the knock spring 34 is inserted between the rear end surface of the knock member 32 and the tail plug 24 of the writing body 16, and always urges the knock member 32 and the cap 30 backward. ing. The knock spring 34 is prevented from being bent or laterally displaced by the rod-shaped portion 32b.

  A guide 36 is inserted into the through hole 30e of each arm 30b of the cap 30. The guide 36 has a shape having a cross-sectional shape just adapted to the through hole 30e, and penetrates the through hole 30e and is slidable through the through hole 30e. In this example, the guide 36 has a cylindrical shape, but may have a polygonal column shape or an elliptical column shape. Alternatively, instead of a solid structure, as shown in FIG. 13, it is also possible to provide a space inside and form a protrusion on the outer surface. As a result, it is possible to adjust the engagement force with the guide groove described below by providing the protrusion with a spring property.

  FIG. 5 shows the guide groove 15 formed in the shaft cylinder 10 by a solid line and the guide groove 19 formed in the writing body 16 by a broken line. The guide groove 15 and the guide groove 19 are provided at positions facing each other. The long front / rear groove portion 15a and the long front / rear groove portion 19a face each other and are respectively on the cap receiver 18c side. Similarly, the short front-rear groove portion 15b and the short front-rear groove portion 19b face each other and are on the pen tip 20 side. Further, the front and rear groove portions 19a extend rearward longer than the front and rear groove portions 15a in which the groove depth becomes gradually shallower toward the rear, and the front and rear groove portions 15b are more than the front and rear groove portions 19b in which the groove depth becomes gradually shallower toward the rear. Also extends long backwards. Both ends of the guide 36 slidable through the through hole 30 e of the arm portion 30 b of the cap 30 are inserted into and engaged with at least one of the guide groove 15 and the guide groove 19. Further, the inclinations of the central portions 15c and 19c of the respective guide grooves 15 and 19 are set so as to face in opposite directions.

  The operation of the writing instrument constructed as described above will be described with reference to FIGS. First, when the writing body 16 is used, the end portion of the guide 36 is inserted into the front and rear groove portions 19a of the guide groove 19 and is positioned at the rear end portion of the front and rear groove portion 19a. Since there is no guide groove 15 facing the rear end of the front and rear groove 19a, the end of the guide 36 is engaged only with the front and rear groove 19a (FIG. 9A).

  At this time, the cap 30 is rotated with respect to the knock member 32 so that the arm portion 30a of the cap 30 is located on the upper side of FIG. 8 and FIG. 10A. Therefore, the cap portion 30c is attached to the cap receiver 18c. And the pen tip 20 is in an unsealed state where the pen tip 20 is exposed. The cap portion 30c is almost housed in the shaft tube 10, and does not obstruct writing with the pen tip 20, so that a writing instrument can be used.

  When writing is complete and it is desired to cover and protect the nib 20, the knock member 32 is knocked by the user. By the advancement of the knock member 32 by the knock, the cap 30 connected to the knock member 32 advances, and at this time, the guide 36 starts from the rear end portion of the front and rear groove portion 19a of the guide groove 19 and follows the front and rear groove portion 19a. (Fig. 9 (a), Fig. 10B), and further moves to the central portion 19c (Fig. 9 (b), Fig. 10C). The guide 36 can move along the inclination of the central portion 19c to the end of the central portion 19c on the front and rear groove portions 19b side (FIGS. 10D and 10E). Accordingly, since the guide 36, the cap 30 and the knock member 32 cannot be further advanced, when the knock force of the knock member 32 is released, the guide 36 moves backward in the front and rear grooves 19b by the restoring force of the knock spring 34 (FIG. 9). (C)). The groove depth of the front / rear groove portion 19b becomes shallow from the middle, and the guide 36 pushed by the groove bottom is inserted into the front / rear groove portion 15b at the opposite end, and extends along the front / rear groove portion 15b to the rear end portion of the front / rear groove portion 15b. Move (FIG. 10F). Since there is no guide groove 19 facing the rear end portion of the front and rear groove portion 15b, the end portion of the guide 36 is engaged only with the front and rear groove portion 15b (FIG. 9D).

  With the above movement of the guide 36, the cap 30 that moves together with the guide 36 moves forward, rotates with respect to the knock member 32, and then moves backward. At this time, the cap portion 30 c of the cap 30 moves away from the cap receiver 18 c and rotates toward the pen tip 20 to surround the pen tip 20. That is, the cap 30 rotates with respect to the knock member 32 so that the arm portion 30b is positioned on the lower side of FIGS. Since the cap 30 and the knock member 32 are urged rearward by the knock spring 34, the cap portion 30c is in close contact with the tip of the protruding portion 18b of the writing body main body 18, and surrounds the pen tip 20 in a sealed state. Drying of the nib 20 can be prevented.

  Next, when it is desired to write, the knock member 32 is knocked again by the user. By advancement of the knock member 32 by this knock, the cap 30 connected to the knock member 32 advances, and at this time, the guide 36 starts from the rear end portion of the front and rear groove portion 15b of the guide groove 15 and extends along the front and rear groove portion 15b. (Fig. 9 (e), Fig. 12B), and further moves to the central portion 15c (Fig. 9 (f), Fig. 12C). The guide 36 can move to the end of the central portion 15c on the front and rear groove portions 15a side along the inclination of the central portion 15c (FIG. 12D). Accordingly, since the guide 36, the cap 30 and the knock member 32 cannot be further advanced, when the knock force of the knock member 32 is released, the guide 36 moves backward in the front and rear grooves 15a by the restoring force of the knock spring 34 (FIG. 9). (G), FIG. 12E). The groove depth of the front / rear groove portion 15a becomes shallow from the middle, and the guide 36 pushed by the groove bottom is inserted into the front / rear groove portion 19a at the opposite end, and extends along the front / rear groove portion 19a to the rear end portion of the front / rear groove portion 19a. Move (FIG. 12F). Since there is no guide groove 15 facing the rear end portion of the front and rear groove portion 19a, the end portion of the guide 36 is engaged only with the front and rear groove portion 19a (FIG. 9 (h)).

  With the above movement of the guide 36, the cap 30 that moves together with the guide 36 moves forward, rotates with respect to the knock member 32, and then moves backward. At this time, the cap 30c of the cap 30 moves away from the pen tip 20, rotates toward the cap receiver 18c, and covers the cap receiver 18c. Thus, the pen tip 20 is exposed, so that writing is possible.

  As described above, in this embodiment, the cap 30 is engaged only with the guide groove 19 when the seal 30 is in the sealed state, and only the guide groove 15 is engaged when the cap 30 is in the sealed state. By alternately knocking the knock members 32, the guide grooves to be guided in the guide 36 are alternately switched between the guide grooves 15 and the guide grooves 19. The guide groove 15 is suitable for moving the cap 30 from the sealed state of the nib 20 to the unsealed state, and the guide groove 19 is suitable for moving the cap 30 from the unsealed state of the nib 20 to the sealed state. Therefore, the cap portion 30c of the cap 30 can reliably perform the reciprocating operation between the sealed state of the pen tip 20 and the unsealed state.

  When the guide 36 is pushed by the groove bottom of each guide groove whose groove depth becomes shallower, the guide groove guided by sliding through the through hole 30e is alternately arranged between the guide groove 15 and the guide groove 19. Although it switches, it is preferable that it is slidable with respect to the through-hole 30e with an appropriate frictional force that is not switched except by being pushed by the groove bottom of the guide groove whose depth becomes shallow.

  The cap portion 30c of the cap 30 is supported by the two arms 30b and 30b, and the spring force of the knock spring 34 is transmitted through the two arms 30b and 30b. 20 sealing states can be stably maintained with good balance.

  In this example, a guide groove 15 for moving the cap 30 from the sealed state of the nib 20 to the unsealed state is formed in the shaft cylinder 10, and the cap 30 is changed from the unsealed state of the nib 20 to the sealed state. The guide groove 19 to be moved is formed in the cursive body 16, but the present invention is not limited to this, and the guide groove for moving the cap 30 from the sealed state of the pen tip 20 to the unsealed state is formed in the cursive body. The guide groove 19 that moves the cap 30 from the sealed state of the pen tip 20 to the sealed state may be formed in the shaft tube 10 or formed in any member in the shaft tube 10, It may be provided in the shaft cylinder.

It is a whole longitudinal cross-sectional view showing embodiment of the writing instrument of this invention. (A) is the longitudinal cross-sectional view of a shaft cylinder, (b) is sectional drawing seen along the 2b-2b line | wire of (a). It is a side view of cursive. (A) is a longitudinal cross-sectional view of a cursive body, (b) is sectional drawing seen along the 4b-4b line of (a). It is a figure showing the guide groove (solid line) formed in the axial cylinder, and the guide groove (broken line) formed in the cursive body. (A) is a longitudinal cross-sectional view of a cap, (b) is a longitudinal cross-sectional view cut by 90 degrees different from (a) of the cap, and (c) is a rear view of the cap. (A) is the longitudinal cross-sectional view of a knock member, (b) is sectional drawing seen along the 7b-7b line | wire of (a). It is a front view of a writing instrument when a cap exists in a sealing release state. It is a cross-sectional view showing the transition between the sealing release state and the sealing state of the cap together with the movement of the guide. It is a longitudinal cross-sectional view of a writing instrument when it exists in the sealing release state of a cap. FIG. 10B is a halfway diagram showing the transition of the cap from FIG. 10A to the sealed state. FIG. 10B is a halfway diagram of the cap following FIG. 10B transitioning to a sealed state. FIG. 10C is a diagram illustrating the transition from the cap following FIG. 10C to the sealed state. FIG. 10D is a diagram illustrating a transition from the cap following FIG. 10D to the sealed state. It is a longitudinal cross-sectional view when it exists in the sealing state of the cap following FIG. 10E. It is a front view of a writing instrument when a cap exists in a sealing state. It is a longitudinal cross-sectional view of a writing instrument when a cap exists in a sealing state. FIG. 12B is a diagram illustrating the transition of the cap from the state shown in FIG. FIG. 12B is a diagram illustrating the transition from the cap following FIG. 12B to the unsealed state. FIG. 12C is a diagram illustrating the transition from the cap following FIG. 12C to the unsealed state. FIG. 12D is a diagram illustrating the transition from the cap following FIG. 12D to the unsealed state. It is a longitudinal cross-sectional view when it exists in the sealing release state of the cap following FIG. 12E. It is a figure which shows other embodiment of the guide which provided the space part inside and formed the projection part in the outer surface.

Explanation of symbols

10 Shaft cylinder 15 Guide groove (second guide path)
15a Front / rear groove (second guide)
15b Front and rear grooves (first guide part)
15c Center part 16 Cursive body 19 Guide groove (1st guide path)
19a Front and rear groove part (first guide part)
19b Front / rear groove (second guide)
19c Central part 20 Nib (tip part of cursive)
30 Cap 30b Arm part 30c Cap part 32 Knock member (operation member)
34 Biasing member 36 Guide

Claims (9)

A shaft cylinder, a writing body held by the shaft cylinder, the tip of which projects forward from the shaft cylinder, and a cap that can cover the tip of the writing body. In a writing instrument comprising: a cap that is movably attached to the shaft cylinder so as to switch between a sealed state and a sealed release state; and an operation member that operates the cap.
A guide provided on the cap;
A biasing member that biases the cap backward,
A first guide path that guides movement of the guide so that the guide can be engaged, and the cap is moved forward and rotated from the unsealed state, and then retracted to enter the sealed state;
A second guide path that guides the movement of the guide so that it can be engaged with the guide, and the cap is moved forward from the sealed state and rotated, and then retracted to enter the sealed state;
With
The writing instrument, wherein the guide is engaged only with the first guide path when the cap is in the unsealed state, and is engaged only with the second guide path when the cap is in the sealed state.   The first guide path and the second guide path are provided to face each other with the guide interposed therebetween, and the guide is provided on the cap so as to be movable between the first guide path and the second guide path. The writing instrument according to claim 1. The first guide path (19) includes a first guide portion (19a) for guiding the movement of the guide so as to advance the cap from the unsealed state, and a center for guiding the movement of the guide so as to rotate the cap. A portion (19c) and a second guide portion (19b) for retracting the cap,
The second guide path (15) includes a first guide portion (15b) for guiding the movement of the guide so as to advance the cap from the sealed state, and a central portion for guiding the movement of the guide so as to rotate the cap. (15c) and a second guide part (15a) for retracting the cap,
While the first guide portion (19a) of the first guide path (19) and the second guide portion (15a) of the second guide path (15) face each other, the first guide portion (19a) of the first guide path (19a). Is extended rearward from the second guide portion (15a) of the second guide path,
While the 2nd guide part (19b) of the 1st guide way (19) and the 1st guide part (15b) of the 2nd guide way (15) oppose, the 1st guide part (15b) of the 2nd guide way The writing instrument according to claim 2, wherein the side extends rearward from the second guide portion (19 b) of the first guide path.   The central portion (19c) of the first guide path (19) extends obliquely from the front end of the first guide portion (19a) toward the front end of the second guide portion (19b). The center portion (15c) of the two guide paths (15) extends from the front end of the first guide portion (15b) so as to incline forward toward the front end of the second guide portion (15a). The writing instrument according to claim 3.   The first guide path and the second guide path are grooves, and the guide is inserted into the groove to be engaged with the first guide path and the second guide path. Writing instrument.   The rear end of each of the second guide part (19b) of the first guide path (19) and the second guide part (15a) of the second guide path (15) gradually has a groove bottom as it goes rearward. The writing instrument according to claim 5, wherein the writing instrument becomes shallow.   The said cap is provided with a pair of arm part which penetrates between a cylinder and a writing body, and a pair of arm part supports the said cap part, The one of Claim 1 thru | or 6 characterized by the above-mentioned. Writing instruments.   The first guide path is provided on either the shaft cylinder or the cursive body, the second guide path is provided on either the shaft cylinder or the cursive body, the guide is slidably provided on the arm portion, and the guide is The writing instrument according to claim 7, wherein the writing instrument is inserted into at least one of the first guide path and the second guide path.   The writing instrument according to claim 1, wherein the cap is tiltably coupled to the operation member.

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